It's funny that you mention that because I'm already working on a solution around that. I'm working on a solution that will periodically backup the contents from your PSReadline history and save it in a searchable format. Then have a cmdlet like Search-History "whatever keywords". I'd like to make it a daemon so it could record estimated times and what console it executed from. I know it would save me a ton for searching.
Also, my one huge-ass OneNote was the reason for me creating this. I found there were a few I kept going back for regularly and wanted a quicker way to get them. Glad to know I'm not the only one.